Welding mechanical arm steering mechanism

The utility model discloses a welding mechanical arm steering mechanism which is characterized in that a mechanical arm body is mounted on a mounting seat, the mounting seat is mounted on a fixing seat, a mounting groove is formed in the mounting seat, a steering assembly is mounted in the mounting groove and comprises a rotating mechanism and a positioning mechanism, and a rotating shaft B on the rotating mechanism is connected with the mechanical arm body; the positioning mechanism is mounted on the side face of the rotating mechanism in the mounting groove, the mechanical arm body is connected with a bearing A, and the bearing A is connected with the mounting base; a positioning mechanism is arranged on the side face of a rotating mechanism, a motor B on the positioning mechanism is started to drive an adjusting rod to extend, an arc-shaped structure positioning block connected to the adjusting rod extrudes a tooth-shaped belt, the tooth-shaped belt is positioned on a gear B, the gear B stops rotating in t